Shoe bearing



Nov. 11, 1930.- c. c. cA1 K|Ns' 1 7 SHOE BEARING Filed NOV. 26, 1929 /& //a@' M I'll AI-l Attorney Patented Nov. 11, 1930 UNITED STATES CLAUDE o. CALKINS, or SPOKANE, WASHINGTONT I srroE BEARING Application filed November 26, 1929. Serial No. 409,988.

My present invention relates to improvements in shoe bearings for agriculturalmachinery in which the shoe is designed to sustain a bearing supporting a rotary part, operative beneath the surface of the ground. The invention is especially adapted for use in connection with rotary rod weeders of the general type utilizing a sub-surface rotating rod for engaging weeds or other plant growth, to tear them out andleave them on the surface of the ground, at the same time working the ground to a mulch to conserve the moisture beneath the surface. In agricultural implements of this character, bearings which must sustain the rotating rod are mounted in a shoe which is formed to ride beneath the surface of the soil and help to maintain itself in that desired position, and which, because of the dirt and grit encountered, must be protective to the bearings and eliminate as much friction between the bearings and the soil as possible. In bearingsjfor this purpose,it has'been foundthat much'dirt will ordinarily enter between the stationary and'moving parts and rapidly cut out or choke the bearing, making the rotary act a difficult one.

In my present invention, it is an object to provide a shoe and a bearing in which the wearing parts can easily be replaced when worn, and inwhich the structure is so designed that any dirt or similar substances 'en- I tering between the bearing surfaces will'work its way out, leaving the bearing clear and providing self-cleaning means for this purpose. I

vide a bearing in a shoe that will offer little or no obstruction as the. shoe passes through the soil, and means whereby the journal of the said bearing may be retained free to rotate, but protected against longitudinal travel. A

And another object of my invention is to provide a bearing eliminating in a large degree any pressures or contact with the dirt in its passage the-rethrough, and which may be removed for replacement with a minimum of time consumed in that; operation.

its more detailed nature the invention Another object of my invention is to pro-' when it is prope-rlyassembled'.

comprises certain novel features of construction; combination and arrangement of parts," I

all of 'whichwill be firstfully described and then be specifically pointed out in the appended claims and illustrated in the accompanying drawing in which Figure 1 is a perspective View of one'of my improved shoe bearings, the supporting standard or bar being indicated in part thereon, as is also the rotatable weeder rod.

Figure 2 is a fragmentary cross-sectional view through the bearing taken on the ver tical centertherethrough. Y

Figure 3 isgasi'de elevation of the removable bearing member and showing the rotating rod in cross-section within its journal.

' Figure 4: is a left side elevationof' the shoe with parts broken'away to disclose the self-cleaning features,

Figure 5is a cross-secti'onal'view taken on i the line 5+5of Figure 4.

The invention comprises the relativelystaso-calle'df, is formed with a pointed and somewhatshovel-shaped and projecting end 11, which assists in placing the'shoe 'belowthe surface'of the soil" when the weeder to which it is attached and of which it'is a part is advanced. This nosing, because of its formation, aids in depressing a rotary member or 7 rod 12, which is supported in the shoe through the rotating journal member l whichis supthe shoefor jrotative action Y 'for receiving a bar 16 which is attached to the weeder frame and isformed into What'iS usually termed a goose-neck. This member is secured to the shoe by the'bolts 17Yand1its' the removable bearing block 14 and acts as a backing or support for said bearing bleck A part of the bearing is formed in the shoe structure as at 20 and has a groove 21-approximately central between the sides of the shoe. Co-acting with this portion of the bearingis forward end abuts against a shoulder-'19 of l when the bearing properly assembled.

' The complementary grooves 21 and 22 pref- Y erably have angular.sides, with;the bottom of the groove forming the narrowest;gpjortion., The bearing block lt mayl be formed of. 7 any proper bearing material, metal or otherwise, and since this member must take most of'the Wear as the thrust on the bearing is directly against this member, it is made apart which is easily replaceable whenitbecomesy too" much-worn to practically serve its'purposer The'bearingmember 14 is an extension member 23fwith a notch 2 1 in its end and .is designed" to 'fit into a correspond e 120 V V f of the bearing flush with the side faces of ingrecess 25'invthe shoe, with the side faces theshoe; This bearing block 14? is also pro- 'vided withupper and lower; flanges 26 and 27 whichffit into corresponding parallel re- 2 cesses 28 and-29 tangential to the journal openingin .the shoe to aid in locating this adjustable bearing block, and maintaining it I fiushwith the shoe when in place. Thus when the movable bearing block is in place, thebarldis secured to the shoe 10 bythe bolts 17, the forward'one of which engages through the notch 2401? the removable bearing block and clamps the block; in position R0- the removablebearing block 14.;

'This'journal member lii has also the tatable within this" bearingthus formed, be-

tween the'shoe and the removablemember- 1s around ournalmember or sleeve 13, which is formed wltha boresquarein cross-section {toreceive thelrotating bar 12. Upon the periphery of the journal member 13 is a celltral, annular. rib 31, formed with inwardly, -sloping sides or tapered in cross section-to correspond with the groove 2l in bearing section 20, and the corresponding groove 22 in same width :as the shoe-andtheabearing, so that a smooth surfaceis provided along the, sides of the shoe inordertoel-iminate an accumu-' 'lation of dirt or'resistanceto progress. Y 7 I Through-the bottom of the shoe,and open- 7 ing into the bearing,isa vertical passage 32, and on the bottom face of the shoeisla groove 33 extending from the passage 32 rearward of the shoe for some distancefto provide a pocket intozand through which the dirtf and debris that may enter the bearing fmay' fallto-provide the self-cleaning features f ofg the bearing. v

The removable bearing block 14 is also prov d d wi h? vert al n e tsem clr'cular in cross 'sectlon and communicatlng with the passage 32 to allow-freedom forjpas- .sage-ofrdirtor; the-like from the bearing into'andthrough thepassage32 and into the space-Q :reck t33iint e m f t e; $1 0.

' ily'understood bylthose The under face of the shoe isp rovided with a slightly curved surface and somewhat c turnedup on the forward end so asto aid. in runningover any solid obstruction that c itmay'meetinits passage'throughthe soil. 1

- 'In machines of the type usingrotating rods below the surface of the'grounch it is necessary' to maintain considerable pressure to keep the rod below the surface, and since the rods are of considerable length, it isusual,

to provide three orjfour such shoes and beariJngs .toproperly support the revolving mem By providing a long tapering nose as 11,

well below the-center of the bearing, I am 9 enabled fomaterially aidthe holdings of the rod in its'desired, position. /The nose 11Ywill part the soilito allowthe shoe and the gooseneck .16 totpas s throughthe soil. '1'

J From the foregoing" description, takenin Q connect on with the accompanying drawing,

itis thoughtthe completestructure, operation Y and advantages of my inventlon will bereadskilled in" theartgj What Iclaimis: 5T

T 1. A b earing of the character, described comprisinga shoe, a fixed bearing element, a replaceable bearing element, flangeson one side of the'latter engaging recessesin .the' shoe, a shoulder on thefreplaceablebearing element,airinset extension member on said replaceable element, a supporting bar ab ut;

ting said shoulder and v overlappingthe Vex, means for fastening bar to tension, and said ,shoe.j

comprising a shoe, integral bearing section on the vshoe, a complementaryreplaceable bearing section, journal member-rotatable inthe bearing, a retainingrib on said member engaging grooves in thelbearing sec- 1 A bearing. of itlie character described tions, and each'ofthe bearing sections having V openings to form a slngle dlrt-cleaning passage extending through the .bottomiof the shoe. r t r 7.1 J: '1 3. vA bearing'fora rotary weedei' comprising a shoe and a bearing sectionformed theref on, a replaceable bearing sect on, a journal vmember rotatable'in the bearing, aretaining rib on said member engaging complementary grooves in the bearing sections,;ea ch ofthe bearing sections having an opening forming a single dirt oleanlng passagefrom the bean ing,;and said shoe having a bottomsgroove extending rearwardlyfrom said' passage.

4; The combination with avshoe having an integral grooved bearingsection andaside recess, of a removablebearingblock having a complementary grooved'bearing section and a rearextension on theblock-forming a shoule der, a support located in said recess,;overlap ping the extension and abuttingsaid, shoulder, bolts? for securing said support, shoe and extension, a journalmember rotatable imthe bearing sections, and a central; annular rib on said member located in said grooved sections. 7 1

5. The combination with a shoe having an integral grooved bearing section, a side recess and upper and lower parallel recesses, of a removable bearing block having a complementary grooved bearing section, upper and lower flanges seated in the parallel recesses, said block having a rear, inset extension forming a shoulder and a bolt-notch in the extension, a support located in the side recess, overlapping the extension and abutting said shoulder, fastening bolts securing the support to the shoe and one of said bolts engaging said notch, a round bearing sleeve rotatable in the bearing sections, a central exterior, an

nular rib on said sleeve rotatable in the grooved sections, said shoe having a vert cal passage from the-bearing and a rearwardly extending, bottom groove communicating with the passage, and said block having a vertical groove communicating With the passage.

, V CLAUDE r o. VCALKINS.

In testimony whereof Iailix nay-signature. 

